633966939 has 16 divisors (see below), whose sum is σ = 988643200. Its totient is φ = 400399848.

The previous prime is 633966913. The next prime is 633966943. The reversal of 633966939 is 939669336.

633966939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 633966939 - 2⁷ = 633966811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (633966959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617389 + ... + 618414.

It is an arithmetic number, because the mean of its divisors is an integer number (61790200).

Almost surely, 2^633966939 is an apocalyptic number.

633966939 is a deficient number, since it is larger than the sum of its proper divisors (354676261).

633966939 is a wasteful number, since it uses less digits than its factorization.

633966939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235831 (or 1235825 counting only the distinct ones).

The product of its digits is 4251528, while the sum is 54.

The square root of 633966939 is about 25178.7001054463. The cubic root of 633966939 is about 859.0574399293.

The spelling of 633966939 in words is "six hundred thirty-three million, nine hundred sixty-six thousand, nine hundred thirty-nine".